I have a 2003 Pontiac Grand Am that recently had front end damage repaired. I was happy to learn the the entire headlight unit (cover, housing, bulbs etc.) was replaced. My happiness was short lived because I quickly discovered that my high beams are dimmer than the low beams. They are so dim that they’re basically useless. I’m not sure dim is correct. They seem to wrap around the side of the road with most of the light being at the top of the trees. Like I said, they were just installed by a reputable service center so it makes me think that it’s not an alignment issue. What else could be causing it?

Check the ground wires and also check that someone didnt put in a single element bulb where a double should be . Chuck

You most likely need a new low beam headlight BULB.It has the low and high beam in it and the separate high beam has only high.
You SHOULD have 2 tabs ,one at each end to pull up and the headlight assembly should then come out easily.
Tapping a blown out headlight can reattach the filament for a short time but after that replacement is necessary.

Click here to see Brian.

look for a ground wire that wasn't installed after the repair or a broken ground wire from the impact

the horn is easiest to access by removing the right side headlight housing. to remove headlight housing. just pull up on the 2 plastic slide pins, under hood at headlights. then pull it out. thats how to change bulb also. god-bless !

To change the bulbs you need to first remove the 5 plastic pop screws on the front bumper. They're spread out at the top of the bumper right under the hood. Once you get those out, you have to remove the two hex bolts on each headlight. Then it gets tricky. You need to pull the light towards the front of the car until it pops out of the ball-bearing type mount on the fender. Once that pops out, you have to pull the front bumper forward while maneuvering the headlight out towards the front.

As per the manual it says as follows:---

Open the hood.

Hold the headlamp to prevent damage to the headlamp or to the fascia. Remove the bolts from the headlamp assembly. Remove the push-in-retainers across the front fascia. Remove the headlamp assembly. Lift the headlamp upward to release the locating tab from the front edge of the fender.

Disconnect the electrical connector from the headlamp assembly.

Remove the headlamp bulb access cover by rotating the headlamp bulb access cover counterclockwise, if necessary.

Remove the headlamp bulb from the housing by rotating the socket counterclockwise, if necessary.

Disconnect the headlamp bulb electrical connector, if necessary.

Remove the park/turn bulb access cover by rotating the cover counterclockwise, if necessary.

Remove the park/turn bulb from the housing by rotating the socket counterclockwise, if necessary.

Gently pull the park/turn bulb from the socket, if necessary. Install the park/turn bulb into the bulb socket.

Install the park/turn bulb socket into the headlamp housing by rotating the socket clockwise.

Install the park/turn bulb access cover by rotating the cover clockwise.

Connect the headlamp bulb to the headlamp electrical connector.

Install the headlamp bulb into the headlamp housing. Rotate the socket clockwise until locked.

Install the headlamp bulb access cover by rotating the cover clockwise.

Position the headlamp assembly to the vehicle. Lift the headlamp upward to release the locating tab to the front edge of the fender.

Install the bolts to the headlamp assembly. Tighten the bolts to 2 N·m (18 lb in).

Install the push-in-retainers across the front fascia.

Close the hood.

----------This will help.thanks.Helpmech.

Upside down L shaped bracket that is bolted to frame just behind headlight assy. Unbolt bracket, lift bracket straight up to unlock headlight assy. Headlight assy should easlier fall forward to replace any of the 3 bulbs

let say something nothing is essay to do. you can see the electrical wire is going to the headlights unplug the wire, unscrew the cup to hold the light bulb and you light bulb came out some case the light bulb is holding for some pin from inside of your headlight in you have to remove the screw is holding you headlight to replace the headlight

how do you change left low beam bulb on 2003 mercedes e320

Actually there are two little black tabs on top of each headlight housing and you simply have to pull them up to release the whole headlamp.

Then follow the rest of emissionwiz's solution.